Fixed bug where the :attr:`.Mapper.all_orm_descriptors` accessor would return an entry for the :class:`.Mapper` itself under the declarative ``__mapper___`` key, when this is not a descriptor. The ``.is_attribute`` flag that's present on all :class:`.InspectionAttr` objects is now consulted, which has also been modified to be ``True`` for an association proxy, as it was erroneously set to False for this object. Fixes: #4729 Change-Id: Ia02388cc25d004e32d337140b62a587f3e5a0b7b
Accessing a collection-oriented attribute on a newly created object no longer mutates ``__dict__``, but still returns an empty collection as has always been the case. This allows collection-oriented attributes to work consistently in comparison to scalar attributes which return ``None``, but also don't mutate ``__dict__``. In order to accommodate for the collection being mutated, the same empty collection is returned each time once initially created, and when it is mutated (e.g. an item appended, added, etc.) it is then moved into ``__dict__``. This removes the last of mutating side-effects on read-only attribute access within the ORM. Fixes: #4519 Change-Id: I06a058d24e6eb24b5c6b6092d3f8b31cf9c244ae
Implemented a new feature whereby the :class:`.AliasedClass` construct can now be used as the target of a :func:`.relationship`. This allows the concept of "non primary mappers" to no longer be necessary, as the :class:`.AliasedClass` is much easier to configure and automatically inherits all the relationships of the mapped class, as well as preserves the ability for loader options to work normally. - introduce new name for mapped_table, "persist_selectable". this is the selectable that selects against the local mapper and its superclasses, but does not include columns local only to subclasses. - relationship gains "entity" which is the mapper or aliasedinsp. - clarfiy name "entity" vs. "query_entity" in loader strategies. Fixes: #4423 Fixes: #4422 Fixes: #4421 Fixes: #3348 Change-Id: Ic3609b43dc4ed115006da9ad9189e574dc0c72d9
Applied on top of a pure run of black -l 79 in I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9, this set of changes resolves all remaining flake8 conditions for those codes we have enabled in setup.cfg. Included are resolutions for all remaining flake8 issues including shadowed builtins, long lines, import order, unused imports, duplicate imports, and docstring issues. Change-Id: I4f72d3ba1380dd601610ff80b8fb06a2aff8b0fe
This is a straight reformat run using black as is, with no edits applied at all. The black run will format code consistently, however in some cases that are prevalent in SQLAlchemy code it produces too-long lines. The too-long lines will be resolved in the following commit that will resolve all remaining flake8 issues including shadowed builtins, long lines, import order, unused imports, duplicate imports, and docstring issues. Change-Id: I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9
The :class:`.AssociationProxy` now has standard column comparison operations such as :meth:`.ColumnOperators.like` and :meth:`.ColumnOperators.startswith` available when the target attribute is a plain column - the EXISTS expression that joins to the target table is rendered as usual, but the column expression is then use within the WHERE criteria of the EXISTS. Note that this alters the behavior of the ``.contains()`` method on the association proxy to make use of :meth:`.ColumnOperators.contains` when used on a column-based attribute. Fixes: #4351 Change-Id: I310941f4e8f778c200f8144a26a89e5364cd4dfb
Added ``.info`` dictionary to the :class:`.InstanceState` class, the object that comes from calling :func:`.inspect` on a mapped object. Fixes: #4257 Change-Id: I32d043f369edb708a17eec2e0b8876db0c1891b4
Reworked :class:`.AssociationProxy` to store state that's specific to a parent class in a separate object, so that a single :class:`.AssocationProxy` can serve for multiple parent classes, as is intrinsic to inheritance, without any ambiguity in the state returned by it. A new method :meth:`.AssociationProxy.for_class` is added to allow inspection of class-specific state. Change-Id: I634f88aae6306ac5c5237a0e1acbe07d0481d6b6 Fixes: #3423
For the purposes of assisting with sharded setups, add a new member to the identity key that can be customized. this allows sharding across databases where the primary key space is shared. Change-Id: Iae3909f5d4c501b62c10d0371fbceb01abda51db Fixes: #4137
tested using pycodestyle version 2.2.0 Fixes: #3885 Change-Id: I5df43adc3aefe318f9eeab72a078247a548ec566 Pull-request: https://github.com/zzzeek/sqlalchemy/pull/343